Acoustic Resonance Spectroscopy of Piezoelectric Crystals under Non-Uniform Heating

Abstract

The experimental results of a study of the equivalent temperature of quartz crystals in the presence of a controlled linear gradient of the thermodynamic temperature are presented. Under conditions of non-uniform heating, the equivalent temperature of crystals was determined by measuring the frequencies of the eigenmodes of acoustic resonances on the basis of the preliminary calibration of the resonance frequencies under uniform heating. It is shown that the equivalent temperature determined in this way characterizes the average thermodynamic temperature of the crystal. Non-uniform heating of a crystal, including the use of laser radiation, was simulated.

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